Milking machinery.



N. J. DAYSH.

Patented Feb. 5, 1918.

2 SHEETSSHEET I.

Tfmw

N. J. DAYSH..

MILK ING MACHINERY.

APPLICATION FILED FEB- 3. I917.

Patented Feb. 5, 11918.

2 SHEETS-SHEET 2.

l a m JOHN DAYSH, OF POUGHKEEPSIJE, NEW YONK, ASSIGNOR TO THE DE LAVNLSEPANATON COMPANY, A CORPORATION'OF NEW J ERSIIEY.

nrtmne nacnrnnar.

s ecification of Letters recent.

Patented Feb. 5, ldild.

hpplication filed February a, 1917. Serial No. M6383.

clear, and exact description, reference being had to the accompanyindrawings, which form a part of this-speci cation.

My invention relates to milking machines of the type in which pneumaticpulsations are used toobtainmilk from a cow, and

particularly to that type. of milking machine 1n which double-chamberedteat cups are used and in which suction, preferably continuous, isapplied to the inner teat cup chambers and in which pneumatic pulsationsare applied to the outer teat cup chamber. The object of my invention isto improve and render more certain the operation and also to reduce thepower required to oper ate a large number of machines by thesubstitution, to a greater or less degree, of mechanical means for thepneumatic means which heretofore, in the specific type of machine towhich my invention is more particularly applicable, has been relied uponto control the pulsator valve located adjacent to the teat cups andusually in a claw through which both the milk and pulsation passages arearranged to extend.

In the accompanying drawings, which show preferred embodiment of theinven-v tion: Figure 1 is a diagrammatic view of a completeinstallation. Fig. 2 is a view, partly in section, of my improved clawcontaining a pulsator and milk chamber or passage, teat cups connectedtherewith, a section of the vacuum line, and the means for controllingthe operation of the pulsator. Fig. 3 is a side view of modified meansfor controlling the pulsator. Fig.4 is a diagrammatic view of a modifiedcomplete installation.

Referring to Fig. 1: Extending from the vacuum pump a, which is drivenby any available motor, not shown, is a vacuum line b that extends fromthe pump to and through the barn, with cocks o where the cows are to bemilked. A drive rod a}, extending alongside the vacuum line 5, 1sreciprocated longitudinally from lever and and may connecting rodmechanism e actuated from a small pulley f belted conveniently to thedrive wheel of the vacuum pump.

.t milk pail 'g is connected to the vacuum pipe I; by a flexible tube Itand to the milk claw j by a flexible tube 2'. Referring to Fig. 2: Themilk claw j is connected to the inner or teat receiving chamber of theteat cup Z by a tube In. The pulsation'claw is shown as attached to themilk claw, but this is not essential. It comprises a two diametercylinder m and a difierential piston and valve a reciprocable therein.The pulsator shown is adapted for alternate pulsation of two pairs ofteat cups but other porting may be used for simultaneous pulsation. Thecylmder shown is open to the atmosphere at both ends; the center is incommunication by a port 0 with continuous suction; and ports 11 and 9,intermediate between the ends and center, communicate with the outer orpulsation chambers of the teat cups Z. The piston n has a central bore rand branch holes 8 at the middle of the large. portion.

A motor, located between the vacuum pipe line and the pulsator m,comprises a cylinder t and a piston u. The cylinder is open at its lowerend to the atmosphere and at its upper end is connected to a three-wayvalve :12, which is adapted to connect the cylinder t with eitheratmosphere or the vacuum pipe line b. The valve is operated to makethese connections alternately by means of an arm 3 having a pin and slotconnection with the drive rod d. The piston a is connected to one end ofa non-extensible wire a that passes through a non-compressible tube 24and the large end of the piston n are both the same size so that theatmospheric pressures actin on them are equal and opposite e neglectedin considering the operating forces. The relative sizes of the small endof the piston n exposed to atmospheric pressure, of the diderential areaex posed to vacuum, and of the upper end of the piston u exposed topulsation, are such that, with a pulsation pipe pressure approximatelyhalf way between the full vacuum and atmospheric, the forces will bebalanced and the piston to wire '0 and valve a will re main at rest.

its

- upward and the piston n to the right, as

sator valve is not moved as shown in Fig. 2. Atmospheric pressure willthen pass through the port 10 to the pulsation chambers of two teat cupsWhile the pulsation chambers of the other two teat cups are connected byports gand o with suction. When the upper end of the cylinder 3 1sconnected with atmosphere, the piston u will move downward and thepiston n to the left, connecting port ;0 with suction and port q,through holes 8 and central bore 7, with the atmosphere.

It will be understood that the invention does not depend upon thespecific construction of the pulsator valve and the motor, as

these may be varied, absolutely or relatively to each other. Othervariations will suggest themselves to those skilled in the art.

It is clear that the above construction is one in which comparativelylittle power is required to operate a large number of machines, therebeing no pulsation line and no master pulsator. Further, a quick, snappymovement, as distinguished from a slow, gradual movement, is imparted tothe pulsator valve, which is advantageous.

The modification shown in Fig. 3 involves a still furthersimplification. The construction is the same as thatof Figs. 1 and 2except that the upper end of the wire '0 is connected directly to onearm of a bell-crank lever z. the other arm of the lever having a pin andslot connection with the drive rod 0?. lllhe pneumatic motor foroperating the piston a, is altogether omitted and the operation of thepulsator valve is controlled wholly by mechanical means. Thissimplification .is advantageous, although the pulquickly as in theconstruction of Figs. ,1 and Still another modification is shown in Fig.4, in'which the construction is the same as in Figs. 1 and 2 with theexception that the upper end ofthe cylinder at is connected with apulsation pipe line 10 in which pneumatic pulsations are produced by amaster pulsator 11, which conveniently may be located at the vacuum pumpa, and driven therefrom. lhe operation is substantially the same as thatdescribed for the construction of Figs. 1 and it, the onlydifl'erencejbeing in the source of the pneumatic pulsations operatingupon the upper surface of the piston u.

Having now fully described my invention,

wearer what I desire to claim and protect by Letters Patent is:

1. In a milking machine operating system, the combination with a vacuumpipe line, of a set of two-chambered teat cups, pipe connections betweenthe vacuum line and the inner teat cup chambers, pipe connections to theouter teat cup chambers and a pulsation valve adapted to producepneumatic pulsations therein, a pneumatically actuated motor, a flexiblemechanical connection between the motor and the pulsation valve, andmeans adapted to connect the motor alternately with relatively high andlow pneumatic pressure thereby controlling its actuation and, throughsaid flexible mechanical connection, controlling the actuation of thepulsation valve.

2. In a milking machine opera. ing system, the combination with a vaculm pipe line, of a set of two-chambered tea; cups, pipe connectionsbetween the vacuum line and the inner teat cup chambers, pipeconnections to the outer teat cup chambers and a pulsation valve adaptedto produce pneumatic pulsations therein, a cylmder, a piston therein, aflexible non-extensible wire connecting said piston and pulsation valve,and means to connect said cylinder alternately with relatively high andlow pneumatic pressure, thereby controlling the actuation of said pistonand, through said wire, the actuation of the pulsation valve.

3. In a milking machine operating system, the combination with a vacuumpipe line, of a set of two-chambered teat cu s, pipe connections betweenthe vacuum line and the inner teat cup chambers, pipe connections to theouter teat cup chambers and a pulsation valve adapted to producepneumatic pulsations therein, a cylinder, a piston therein, a flexiblemechanical connection between said piston and pulsation valve, 8. driverod, means to reciprocate the drive rod longitudinally, and means,including a valve, actuated from the drive rod, to connect said cylinderalternately with relatively high and low pneumatic pressure.

4. In a milking machine operating system, the combination with a vacuumpipe 1 line, of a set of double chambered teat on s, pipe connectionsbetween the vacuum line and the inner teat cup chambers, a valvechamber, pipe connections between the outer teat cup chambers and thevalve chamber, 120 and a reciprocable piston in the valve chamberadapted to produce pneumatic pulsations in the outer teat cup chambers,a cylinder and a piston therein, a flexible non-extensible wireconnecting the two pistons, and 125 means adapted to connect one face ofthe second piston alternately with relatively high and low pneumaticpressure, said pistons having pressure surfaces adjusted relatively toeach other sothat the connection 130 t wu ltt of the last named face ofthe second piston alternately with relatively high and low pneumaticpressure will effect reciprocation of the two pistons in unison.

5. In a milking machine operating system, the combination with a vacuumpipe line, of a set of two-chambered teat cups, pipe connections betweenthe vacuum line and the inner teat cup chambers,a pulsation valvechamber, a pulsation valve therein having end heads of difierentdiameters both exposed to atmosphere, the space within the pulsationvalve chamber between said heads being in communication with the vacuumline, pipe connections to the outer teat cup chambers adapted to beplaced alternately in communication with the atmosphere and tilt withthe space between the end heads of the valve by the reciprocation of thelatter, a flexible non-extensible wire connected wlth the larger endhead of the pulsation valve, and means to alternately pull said wire andrelieve said pull, whereby the pulsator valve is moved in one directionby the unbalanced pressure on its end heads and is moved in the otherdirection by a pull on the wire overcoming said unbalanced pressure.

In testimony of which invention, I have hereunto set my hand, at city ofNew York, on this 30th day of January, 1917.

NORMAN JOHN DAYSH. Witnesses:

Geo. 1R. REMINGTON, Geo. D. TALLMAN.

